Pumping lubricating cup



April 17, 1928.

. G. L. MOORE PUMPING LUBRICATING CUP Filed Aug. 5. 1925 u u m 5 www g ay i i .6 if

Patented Apr. 17, 1928.

UNITED STATES ,7 1,666,502 PATENT 0FFlCE.

GEORGE L. MOORE, OF CHICAGO, ILLINOIS.

PUMPING LUBRIOATING CUP.

Application filed August a, 1925. Serial No. 47,658.

tages, reference may be had to the following detailed description takenin connection with the accompanying drawing, wherein:

Figure 1 is a vertical section through a device embodying the presentinvention, the pump plunger being shown in its lowermost position; andFig. 2 is a view similar to Fig. 1 showing the plunger raised.

Referring to the drawing, 1 represents a cup of any desired constructionhaving at the bottom a tubular stem 2 that is adapted to be screwed intoa part A containing a bearing and thus support the cup from the latter.YVithin the cup is a small cupshaped member 3 having a tubularprojection 4 fitting into the upper end of the tubular stem. Extendingat'its lower end into the member 3, and having a sliding fit in thelatter, is a heavy plunger 5 having a reduced lower end 6 that has asliding fit in the tubular member 4. The upper end of the plunger issurrounded by an annular rib 7 on the under side of the top or cover 8of the cup. Surrounding the plunger, above the member 3, is a weight 9that may be locked thereon by a set screw 10. Surrounding the member 3and resting upon the bottom of the cup is a spring 11 whose upper endengages with the under face of the weight 9. The parts are soproportioned that the upward pressure of the spring is slightly greaterthan the downward pull of gravity on the plunger and its weight,

so that the plunger is normally held raised as shown in Fig. 2;Consequently a slight jar whichtends to move the plunger down- 'war dsrelatively to the surrounding cup, will cause the plunger to descend tothe lower limit of its movement as shown in Fig. 1. When the plunger isup, the reduced lower end thereof stands clear of the bottom of thecup-shaped member 3 so as to permit the contents of the latter, if therebe any, to dram down through the tubular part '4. The sides of themember 3 are perforated just above the bottom thereof,'as indicated at2, so that the lubricant contained in the main cup will flow into theauxiliary cup and'out through the bottom of the latter when the plungeris up. lVhen the plunger is arred down, the reduced lower end thereofclosesthc hole in thebottom of the auxiliary cup.

Within the tubular stem of the main cup is a check valve 13 that seatsupwardly and prevents the lubricant from-flowing down into the bearingwhen the check valve is closed. In the arrangement shown the check valveis in the form of a ball that rests on a spring 14 which in turn restson a ring 15 screwed into the lower end of the stem 2. The auxiliary cupis preferably of case hardened iron, and therefore placed in the tubularstem 2, just below the part 4 is a ring 16 of suitable material tocontain the seat for the check valve.

' Normally, when there is no vibration, the plunger ocoupys its upperposition asindi cated in Fig. 2. Assuming the device to be on atraveling vehicle, it will be understood that there will be many jarsthat will cause the cup to rise suddenly. Whenever this occurs theinertia of the weighted plunger causes it to remain relativelystationary, so that the reduced lower end is driven into the outlet forthe lubricant and forces the column of lubricant in the passage abovethe check valve sharply ahead of it and push the check valve opensufficiently far 'to permit the passage of an amount of lubricant equalto that displaced. in the upper end of the passage by the reduced end ofthe plunger. The mass of the plunger and its attached weight isconsiderable, and therefore the lubricant will be forced into thehearing at a comparatively high pressure. The move; ments of the plungerhave been exaggerated in the drawing for the sake of clearness, but themovements of the plunger and particularly the distance to which itenters the out let passage, may be made quite small, so that only aminute quantity of the lubricant will be forced out at each downwardstroke.

The main cup may be filled through a proved device feeds the lubricantpositively and with considerable force, it serves not only as anefiicient lubricating means, but permits comparatively inaccessiblehearingsto be lubricated efiectively without requir-- I ing the user togo near the device, as he may supply the lubricant from a remote pointwithout danger of flooding the bearings. It should also be noted thatthough the plunger normally occupies its upper position. the check valveat such times prevents lubricant from flowing into the hearing. In otherwords, when an automobile is standing still and no additional lubricantis needed in those bearings between the parts of which there is nomotion, none will fiow. into such bearings. 1

While I have illustrated and described with particularity only a singlepreferred form of my invention, I do not desire to be limited to theexact structural details thus illustrated and described; but intend tocover all forms and arrangements vwhich come within the definitions ofmy invention constituting the appended claims.

'Iclaim:

1. In combination, a lubricant receptacle having a smalldischarge'outlet in the bottom, a heavy vertically movable member havinga reduced end adapted to fit said out let with a sufficient degree oftightness to act as a plunger positively to expel lubricating materialthat has entered the outlet, means for counterbalancing the weight ofabove the'upper end of said the plunger, and means for restricting themovements of the plunger between a lower limit in which the reduced endextends a short distance intosaid outlet and an upper limit in whichsaid end stands above said outlet.

2. In combination, a lubricant receptacle having an outlet passage ofsmall cross-section leading out of the bottom, a heavy vertical plungerhaving its lower end shaped to fit slidably into said passage, guidingand stop means to permit the plunger to rise and fall between a lowerlimit in which it extends a short distanceinto said passage and an upperlimit in which its lower end stands passage, and a check valve in saidpassage.

3. In combination, a lubricant receptacle having an outlet passage ofsmall cross section leading out ofthe bottom, a heavy vertical plungerhaving its lower end shaped to fit slidably into said passage, guidingand stop means to permit the plunger to rise and fall between a lowerlimit in which it extends a short distance into said passage and anupper limit in which its lower end stands above the upper end of saidpassage, an upwardly seating check valve in said passage, and a springnormally supporting the plunger in its upper position.

Intestimony whereof, I sign this specification.

' GEORGE Moons.

